EXPERIMENTAL DATA CODEBOOK-------------------------------------------------------------------------
ResponseIdQualtrics embedded data field (more information is available on Qualtrics' website at https://www.qualtrics.com/support/survey-platform/data-and-analysis-module/data/download-data/understanding-your-dataset/)Character variable indicating unique respondent ID.-------------------------------------------------------------------------ScenarioTreatment scenario 0000 � South Korea, Conventional, No Tripwire, No Retaliation0001 � South Korea, Conventional, No Tripwire, Retaliation0010 � South Korea, Conventional, Tripwire, No Retaliation0011 � South Korea, Conventional, Tripwire, Retaliation0100 � South Korea, Nuclear, No Tripwire, No Retaliation0101 � South Korea, Nuclear, No Tripwire, Retaliation0110 � South Korea, Nuclear, Tripwire, No Retaliation0111 � South Korea, Nuclear, Tripwire, Retaliation1000 � Japan, Conventional, No Tripwire, No Retaliation1001 � Japan, Conventional, No Tripwire, Retaliation1010 � Japan, Conventional, Tripwire, No Retaliation1011 � Japan, Conventional, Tripwire, Retaliation1100 � Japan, Nuclear, No Tripwire, No Retaliation1101 � Japan, Nuclear, No Tripwire, Retaliation1110 � Japan, Nuclear, Tripwire, No Retaliation1111 � Japan, Nuclear, Tripwire, Retaliation-------------------------------------------------------------------------
JapanDPRK attack is on Nagoya, Japan0 � No1 � Yes-------------------------------------------------------------------------
NuclearDPRK attack uses nuclear weapons0 � No1 � Yes-------------------------------------------------------------------------
TripwireDPRK attack specifically kills U.S. soldiers0 � No1 � Yes-------------------------------------------------------------------------
RetaliationDPRK threatens to retaliate against the US if it responds0 � No1 � Yes-------------------------------------------------------------------------
ResponseROKOutcome Variable: Most aggressive respondent choice in South Korea Scenarios99 � Prefer not to answer0 � Do nothing1 � Condemn the attack2 � Impose new sanctions3 � Launch conventional strikes4 � Invade North Korea5 � Launch nuclear strikes -------------------------------------------------------------------------
ResponseJPNOutcome Variable: Most aggressive respondent choice in Japan Scenarios99 � Prefer not to answer0 � Do nothing1 � Condemn the attack2 � Impose new sanctions3 � Launch conventional strikes4 � Invade North Korea5 � Launch nuclear strikes -------------------------------------------------------------------------
MaxResponseOutcome variable: Most aggressive respondent choice in any Scenario99 � Prefer not to answer0 � Do nothing1 � Condemn the attack2 � Impose new sanctions3 � Launch conventional strikes4 � Invade North Korea5 � Launch nuclear strikes -------------------------------------------------------------------------
MilResponseDoes the respondent support any military response (conventional strikes, invasion, nuclear strikes)0 � No1 - Yes-------------------------------------------------------------------------
WarDoes the respondent support extreme military responses (invasion, nuclear strikes)0 � No1 - Yes-------------------------------------------------------------------------
NuclearMissileIs the respondent�s most aggressive choice nuclear0 � No1 - Yes-------------------------------------------------------------------------
ConventionalIs the respondent�s most aggressive choice conventional (conventional strikes, invasion)0 � No1 - Yes-------------------------------------------------------------------------
NonmilitaryIs the respondent�s most aggressive choice nonmilitary (do nothing, condemn, sanctions)0 � No1 - Yes-------------------------------------------------------------------------
IdeologyIs the respondent liberal or conservative1 � Very conservative2 � Somewhat conservative3 � Moderate4 � Somewhat liberal5 � Very liberal-------------------------------------------------------------------------
GenderRespondent gender0 � Female1 � Male-------------------------------------------------------------------------
AgeRespondent ageNumeric String-------------------------------------------------------------------------
AgeGroupRespondent age group1 � 18-242 � 25-343 � 35-444 � 45-545 � 55-646 � 65-99-------------------------------------------------------------------------
ProliferationRespondent support for proliferation1 � Strongly disagree2 � Somewhat disagree3 � Neither agree nor disagree4 � Somewhat agree5 � Strongly agree99 � Prefer not to answer-------------------------------------------------------------------------
NuclearRetalSupport for strike if launched by US PresidentImagine that, following the hypothetical scenario you read, the President of the United States decided to retaliate against North Korea with a series of nuclear strikes intended to destroy the Kim Jong-un regime. Do you agree or disagree with this decision?1 � Strongly disagree2 � Somewhat disagree3 � Neither agree nor disagree4 � Somewhat agree5 � Strongly agree99 � Prefer not to answer-------------------------------------------------------------------------
TrumpSelf-identified Trump Supporter0 � No1 � Yes-------------------------------------------------------------------------
SupNucRetalSupport for nuclear retaliation if launched by US President0 � No (Strongly disagree, disagree, neither agree nor disagree, prefer not to answer)1 � Yes (Somewhat agree, strongly agree)

-------------------------------------------------------------------------IncomeReported annual income
Numeric string
-------------------------------------------------------------------------logIncomelog of incomeNumeric string

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Support.AllyFree response coding, theme of support for allies0 � No1 � Yes -------------------------------------------------------------------------Punish.RevengeFree response coding, theme of punishment or revenge0 � No1 � Yes -------------------------------------------------------------------------Eliminate.ThreatFree response coding, theme of eliminating a threat0 � No1 � Yes -------------------------------------------------------------------------Avoid.EntanglementFree response coding, theme of avoiding entanglement0 � No1 � Yes -------------------------------------------------------------------------Avoid.Nuclear.UseFree response coding, theme of avoiding nuclear use0 � No1 � Yes 